Changes to INI file handling

PHP 5.3.0 has significantly improved performance and parsing of INI files,
and adds several new syntax features.

The standard php.ini files have been re-organized and renamed.
php.ini-development contains settings recommded
for use in development environments. php.ini-production
contains settings recommended for use in production environments.

There is now support for two special sections:
[PATH=/opt/httpd/www.example.com/] and
[HOST=www.example.com]. Directives set in these
sections cannot be overridden by user-defined INI files or at
runtime. More information about these sections can be found
here.

zend_extension_debug and
zend_extension_ts have been removed. Use the
zend_extension directive to load all Zend Extensions.

zend.ze1_compatibility_mode has been removed. If this
INI directive is set to On, an E_ERROR error is
emitted at startup.

It is now possible to use the full path to load modules using the
"extension"
directive.

"ini-variables" can now be used almost anywhere in a
php.ini file.

Runtime tightening of open_basedir restrictions is now
possible.

It is now possible to use alphanumeric or variable indices in INI option
arrays.